Stiffening-pieces inserted in the shank or waist of the shoe to preserve the arch of the sole.
SEE OR SEARCH CLASS
128, Surgery,
589, for outside shank stiffeners in which the supporting means comprises means located beneath the shank of the shoe, for providing support for the longitudinal arch, and subclass 623 for devices in which the supporting means comprises a shank stiffener provided with means to underlie and support the metatarsal arch of the foot.
